关键词: Vegas Reno兼容性 拥塞控制

Abstract:

Since the rapid development of the Internet brings the quick expansion of information, so network congestion has become a bottleneck. Despite the superiority of TCP Vegas which was proposed in 1995 over the other TCP congestion control algorithms, Vegas is still not the most widely used one instead ofTCP Reno. Research shows it is due to Vegas＇ incapability of seizing bandwidth fairly in heterogeneous network environments, so the overall performanc ce can not be improved essentially. In this paper, we analyze how Vegas and Reno seize bandwidth and propose an improved congestion control algorithm in the environment where Reno and Vegas coexist. By properly selecting parameters a and/3 based on different bottleneck buffer sizes,we show the good comp  atibility of Vegas and Reno and prove the efficiency and correctness of the algorithm through simulation.

Key words: Vegas, Reno, compatibility, congestion control